Android RecyclerView多类型布局卡片解决方案

package com.lkh.multiadapter;import android.support.annotation.LayoutRes;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import java.util.List;/** * 列表单项布局与数据绑定 * Created by luokanghui on 2017/5/24. */public abstract class ItemViewAdapter<E>{  /**   * 返回列表单项View，如果View由资源layout加载而来，直接重写{@link #onGetLayoutId()}即可   * @param parent 父view，一般为RecyclerView   * @return 列表单项View   */  public View onCreateView(ViewGroup parent){    return LayoutInflater.from(parent.getContext()).inflate(onGetLayoutId()        , parent, false);  }  /**   * 当RecyclerViewHolder创建成功后调用，只会调用一次   * @param viewHolder 单项view集合   */  public void onCreate(RecyclerViewHolder viewHolder){  }  /**   * 返回单项布局的资源id，如果重写了{@link #onCreateView(ViewGroup)}，则此方法可能失效   * @return 单项布局layout id   */  @LayoutRes  protected abstract int onGetLayoutId();  /**   * 把数据与view进行绑定，滑动时都会调用   * @param viewHolder 单项view集合   * @param data 具体数据   * @param position 在列表中的位置   */  public abstract void bindData(RecyclerViewHolder viewHolder, E data, int position);  /**   * 局部更新时调用   * @param viewHolder 单项view集合   * @param data 具体数据   * @param position 在列表中的位置   * @param payloads 局部更新标志，不会为空（isEmpty()==false)   */  public void bindData(RecyclerViewHolder viewHolder, E data, int position, List<Object> payloads){  }}

package com.lkh.multiadapter.sample;import android.widget.TextView;import com.lkh.multiadapter.ItemViewAdapter;import com.lkh.multiadapter.R;import com.lkh.multiadapter.RecyclerViewHolder;/** * 卡片1实现 * Created by luokanghui on 2019/3/18 */public class SampleOneItemViewAdapter extends ItemViewAdapter<DataOne> {  @Override  protected int onGetLayoutId() {    //布局layout资源id    return R.layout.item_one;  }  @Override  public void bindData(RecyclerViewHolder viewHolder, DataOne data, int position) {    //根据id获取view    TextView tvContent = viewHolder.getView(R.id.tv_content);    //数据绑定    tvContent.setText(data.getContent());  }}

package com.lkh.multiadapter.sample;/** * 卡片1数据 * Created by luokanghui on 2019/3/18 */public class DataOne {  private String content;  public String getContent() {    return content;  }  public void setContent(String content) {    this.content = content;  }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:background="#eeeeee"  android:orientation="vertical">  <TextView    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="卡片1"    android:textColor="#000000" />  <TextView    android:id="@+id/tv_content"    android:layout_width="wrap_content"    android:layout_height="50dp"    android:gravity="center"    android:textColor="#000000" /></LinearLayout>

package com.lkh.multiadapter.sample;import android.widget.TextView;import com.lkh.multiadapter.ItemViewAdapter;import com.lkh.multiadapter.R;import com.lkh.multiadapter.RecyclerViewHolder;/** * 卡片2实现 * Created by luokanghui on 2019/3/18 */public class SampleTwoItemViewAdapter extends ItemViewAdapter<DataTwo> {  @Override  protected int onGetLayoutId() {    //布局layout资源id    return R.layout.item_two;  }  @Override  public void bindData(RecyclerViewHolder viewHolder, DataTwo data, int position) {    //根据id获取view    TextView tvNum = viewHolder.getView(R.id.tv_num);    //数据绑定    tvNum.setText("num="+data.getNum());  }}

package com.lkh.multiadapter.sample;/** * 卡片2数据 * Created by luokanghui on 2019/3/18 */public class DataTwo {  private int num;  public int getNum() {    return num;  }  public void setNum(int num) {    this.num = num;  }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:background="#999999"  android:orientation="vertical">  <TextView    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="卡片2"    android:textColor="#0000ff" />  <TextView    android:id="@+id/tv_num"    android:layout_width="wrap_content"    android:layout_height="100dp"    android:gravity="center"    android:textColor="#0000ff" /></LinearLayout>

package com.lkh.multiadapter.sample;import com.lkh.multiadapter.ItemViewAdapter;import com.lkh.multiadapter.MultiRecyclerViewAdapter;/** * 多布局adapter，根据不同data及position，使用不同ItemViewAdapter卡片 * Created by luokanghui on 2019/3/18 */public class SampleMultiAdapter extends MultiRecyclerViewAdapter<Object> {  private static final int TYPE_EMPTY = 0;//空item  private static final int TYPE_ONE = 1;//卡片1  private static final int TYPE_TWO = 2;//卡片2  @Override  public int getViewType(Object data, int position) {    if (data instanceof DataOne){//卡片1      return TYPE_ONE;    }    if (data instanceof DataTwo){//卡片2      return TYPE_TWO;    }    return TYPE_EMPTY;//空item  }  @Override  public ItemViewAdapter onCreateItemViewAdapter(int viewType) {    switch (viewType){      case TYPE_ONE://卡片1        return new SampleOneItemViewAdapter();      case TYPE_TWO://卡片2        return new SampleTwoItemViewAdapter();      default://空item        return new EmptyItemViewAdapter();    }  }}

package com.lkh.multiadapter;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import com.lkh.multiadapter.sample.DataOne;import com.lkh.multiadapter.sample.DataTwo;import com.lkh.multiadapter.sample.SampleMultiAdapter;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    RecyclerView recyclerView = findViewById(R.id.recycler_view);    recyclerView.setLayoutManager(new LinearLayoutManager(this));    SampleMultiAdapter adapter = new SampleMultiAdapter();    //设置数据    adapter.setData(generateData());    //设置adapter    recyclerView.setAdapter(adapter);  }  //造测试数据  private List<Object> generateData(){    List<Object> list = new ArrayList<>();    for (int i=0; i<20; i++){      DataOne dataOne = new DataOne();      dataOne.setContent("这是卡片1数据："+i);      list.add(dataOne);      DataTwo dataTwo = new DataTwo();      dataTwo.setNum(i);      list.add(dataTwo);    }    return list;  }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:orientation="vertical">  <android.support.v7.widget.RecyclerView    android:id="@+id/recycler_view"    android:layout_width="match_parent"    android:layout_height="match_parent"/></LinearLayout>

package com.lkh.multiadapter;import android.support.v7.widget.RecyclerView;import android.view.ViewGroup;import java.util.List;/** * 多种布局adapter * Created by luokanghui on 2017/5/24. */public abstract class MultiRecyclerViewAdapter<E> extends RecyclerView.Adapter<RecyclerViewHolder> implements ItemViewAdapterFactory<E> {  public static final int NO_TYPE = -1;  private List<E> dataList;  protected final MapData mMapData = new MapData();  public MultiRecyclerViewAdapter setData(List<E> list) {    this.dataList = list;    return this;  }  @Override  public RecyclerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {    ItemViewAdapter itemViewModule = onCreateItemViewAdapter(viewType);    RecyclerViewHolder recyclerViewHolder = new RecyclerViewHolder(itemViewModule.onCreateView(parent), itemViewModule, this, getContextMap());    itemViewModule.onCreate(recyclerViewHolder);    return recyclerViewHolder;  }  @Override  public void onBindViewHolder(RecyclerViewHolder holder, int position) {    if (checkItems(position)) {      return;    }    holder.itemViewAdapter.bindData(holder, dataList.get(position), position);  }  @Override  public void onBindViewHolder(RecyclerViewHolder holder, int position, List<Object> payloads) {    if (checkItems(position)) {      return;    }    if (payloads.isEmpty()) {      super.onBindViewHolder(holder, position, payloads);    } else {      holder.itemViewAdapter.bindData(holder, dataList.get(position), position, payloads);    }  }  @Override  public int getItemViewType(int position) {    if (checkItems(position)) {      return NO_TYPE;    }    return getViewType(dataList.get(position), position);  }  @Override  public int getItemCount() {    return dataList == null ? 0 : dataList.size();  }  /**   * true表示没通过   */  private boolean checkItems(int position) {    return dataList == null || position < 0 || position >= dataList.size();  }  @Override  public MapData getContextMap() {    return mMapData;  }}

package com.lkh.multiadapter;/** * 多布局ItemViewAdapter创建者 * Created by luokanghui on 2017/5/24. */public interface ItemViewAdapterFactory<E> {  /**   * 返回ItemViewAdapter的类型   * 建议根据data的数据类型判断不同的viewType   * @param data 具体数据   * @param position 在列表中的位置   * @return 类型   */  int getViewType(E data, int position);  /**   * 根据不同的viewType返回不同的ItemViewAdapter   * @param viewType 类型   * @return ItemViewAdapter   */  ItemViewAdapter<? extends E> onCreateItemViewAdapter(int viewType);  /**   * 上下文数据   * @return   */  MapData getContextMap();}

package com.lkh.multiadapter;import android.support.v7.widget.RecyclerView;import android.util.SparseArray;import android.view.View;/** * ViewHolder基类 */public final class RecyclerViewHolder extends RecyclerView.ViewHolder {  private final SparseArray<View> views;  ItemViewAdapter itemViewAdapter;  private final RecyclerView.Adapter adapter;  private final MapData mMapData ;  public RecyclerViewHolder(View itemView, ItemViewAdapter itemViewAdapter, RecyclerView.Adapter adapter, MapData mapData) {    super(itemView);    this.views = new SparseArray<>();    this.itemViewAdapter = itemViewAdapter;    this.adapter = adapter;    this.mMapData = mapData;  }  /**   * 根据id获取view，如果缓存中存在，直接使用缓存中的，避免重复执行findViewById   */  @SuppressWarnings("unchecked")  public <T extends View> T getView(int viewId) {    View view = views.get(viewId);    if (view == null) {      view = itemView.findViewById(viewId);      views.put(viewId, view);    }    return (T) view;  }  public RecyclerView.Adapter getAdapter(){    return adapter;  }  /**   * 获取数据上下文   */  public MapData getContextMap(){    return mMapData;  }}

package com.lkh.multiadapter;import android.support.annotation.LayoutRes;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import java.util.List;/** * 列表单项布局与数据绑定 * Created by luokanghui on 2017/5/24. */public abstract class ItemViewAdapter<E>{  /**   * 返回列表单项View，如果View由资源layout加载而来，直接重写{@link #onGetLayoutId()}即可   * @param parent 父view，一般为RecyclerView   * @return 列表单项View   */  public View onCreateView(ViewGroup parent){    return LayoutInflater.from(parent.getContext()).inflate(onGetLayoutId()        , parent, false);  }  /**   * 当RecyclerViewHolder创建成功后调用，只会调用一次   * @param viewHolder 单项view集合   */  public void onCreate(RecyclerViewHolder viewHolder){  }  /**   * 返回单项布局的资源id，如果重写了{@link #onCreateView(ViewGroup)}，则此方法可能失效   * @return 单项布局layout id   */  @LayoutRes  protected abstract int onGetLayoutId();  /**   * 把数据与view进行绑定，滑动时都会调用   * @param viewHolder 单项view集合   * @param data 具体数据   * @param position 在列表中的位置   */  public abstract void bindData(RecyclerViewHolder viewHolder, E data, int position);  /**   * 局部更新时调用   * @param viewHolder 单项view集合   * @param data 具体数据   * @param position 在列表中的位置   * @param payloads 局部更新标志，不会为空（isEmpty()==false)   */  public void bindData(RecyclerViewHolder viewHolder, E data, int position, List<Object> payloads){  }}